JP2530780Y2 - Automatic pipe welding equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically welding a joint of a short pipe which is formed by bending a short plate into a substantially circular shape.

[0002]

2. Description of the Related Art In an automatic welding apparatus of this kind, a short pipe fed in (hereinafter referred to as a pipe, which is indicated by a symbol P in FIG. 10).
Is automatically detected, the pipe is clamped in the detected position, and welding is performed on the welding line while feeding the pipe in this position.
As seen in No. 5310, the outer periphery of the pipe is restrained.

[0003]

As described above, in the method in which the outer periphery of the pipe is clamped while being restrained, the inward displacement is possible. There was a problem that variation was apt to occur and welding quality varied.

The present invention has been made to solve this problem, and an object of the present invention is to provide an automatic pipe welding apparatus capable of always obtaining good welding quality by restraining a joint portion of a pipe from inner and outer surfaces. With the goal.

[0005]

In order to achieve the above object, the present invention provides a pipe feeding unit, a pipe rolling unit which has a pair of rolling receiving rollers for receiving a pipe at a pipe outlet of the pipe feeding unit, and is capable of moving up and down. A pipe pressing unit having a cylinder in which a rod advances and retreats in the roller direction above the rolling receiving roller pair of the pipe rolling unit, and a pipe axial seam is located above the rolling receiving roller pair of the pipe rolling unit. A sensor unit having a seam sensor for detecting, a mandrel unit provided with a pipe rolling unit interposed therebetween and having a mandrel facing the rod advancing and retreating direction, above the stationary position of the mandrel, and capable of moving up and down on the mandrel Welding of clamp unit with clamper, pipe discharge unit and pipe joint A pipe end abutting plate that abuts one end of a pipe on the pair of raised rolling receiving rollers is attached to the rod end of the cylinder, and the mandrel advances and retreats in a horizontal direction. And a pipe end contact plate elastically connected to a support plate for cantilevering the base end thereof and penetrating a mandrel tip end, wherein the pipe end contact plate is raised above A configuration was provided near the pair of rolling receiving rollers and opposed to the pipe end contact plate.

[0006]

According to the present invention, at the time of welding, the pipe joint of the pipe is received by the mandrel from the inner surface and is held down by the clamper from the outer surface.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows the arrangement of main units of the apparatus according to the present invention, and FIG. 2 shows the details thereof.

In FIG. 1, 10 is a pipe intermittent feeding unit, 20 is a pipe rolling unit, 40 is a pipe pressing unit, 50 is a sensor unit, 60 is a mandrel unit, 70 is a clamp unit, 80 is a pipe discharge unit, and 90 is a pipe discharge unit. It is a welding unit.

In FIG. 2, a pipe intermittent feeding unit 10 is provided at a pipe chute 12 supported on four pillars 11 erected on a base 1 at an angle and a descending end (outlet side) thereof. The stop cylinder 13 for intermittent feeding is provided.

The pipe rolling unit 20 has a lift 21 and vertical support frames 22 and 23 provided on the lift 21, and two rolling receivers arranged in parallel between the support frames 22 and 23. The rollers 24 and 25 are pivotally supported. The two rolling receiving rollers 24 and 25 are connected to the outlet 1 of the pipe chute 12.
2B is arranged in a direction intersecting with the pipe feeding direction, and one of the rolling receiving rollers 24 is driven by a motor 26 on an elevator 21 from a pulley 27, a belt 28, a pulley 2
The rotational force is transmitted through a transmission mechanism including the transmission mechanism 9. 30
Is a lifting cylinder for vertically moving the lifting table 21;
Reference numerals 1 and 32 denote guide rods that hang down from below the elevating table 21. The guide rods 31 and 32 are vertically guided by guide cylinders 35 and 36 provided on a horizontal gantry 34 supported by a vertical support frame 33. .

Reference numeral 41 denotes a cylinder of the pipe pressing unit 40, which is horizontally supported by the support frame 33 via a support member 41A at a predetermined height from the base 1. The cylinder 41 is supported in a posture facing the axial direction of the rolling receiving rollers 24 and 25, and a pipe contact plate 42 (shown in FIG.
A predetermined height position on the boundary line of No. 5 is defined as an advance / retreat route L.

Reference numerals 51 and 52 denote pipe joint detection sensors of the sensor unit 50.
The support plate 45 is held above the predetermined height position on the boundary line 25 at a predetermined interval in the direction of the advance / retreat path L.

Reference numeral 61 denotes a pipe end abutting plate of the mandrel unit 60, and the mandrel 6 extends in the direction of the forward / backward path L.
2 has a penetrating end. The base end of the mandrel 62 is supported on the front surface of a support plate 63.
3 is supported on the end of the rod 64A of the mandrel cylinder 64. 65A and 65B are guide shafts, one end of which extends in parallel with the mandrel 62 through the support plate 63,
The other end passes through the pipe end contact plate 61. Guide shaft 6
A stopper (stopper member) 65 is provided at both ends of 5A and 65B.
C is attached. A coil spring 66 is interposed between the guide shafts 65A and 65B. 67A and 67B are guide shafts, one ends of which are fixed to the back surface of the support plate 63 and extend in parallel with the rod 64A, and the other ends are guide cylinders 68A and 68.
B penetrates. Reference numeral 69 denotes a fixed frame, which supports the mandrel cylinder 64 and the guide cylinders 68A and 68B.

The clamp unit 70 has clampers 71 and 72 as shown in FIG. This clamper 7
Reference numerals 1 and 72 are attached to support members 73 and 74, respectively, and the support members 73 and 74 are supported on a fixed member 75 so as to be slidable (openable and closable left and right). 76A, 76
B is a slide bolt, and 77A and 77B are return springs.

As shown in FIG. 5, a welding unit 90 is engaged with a horizontal guide rail 91 on a lifting platform (not shown) and is reciprocally driven in the direction of the advance / retreat path L, and a welding torch supported by the arm 92. 94 is a welding robot. The relationship between the welding robot and the other parts described above is shown in FIGS.

Next, the operation of this device will be described.

(1) Loading port 12A of pipe chute 12
Rolled on the pipe chute 12 and moved out onto the receiving rollers 24 and 25 from the outlet 12B.

(2) The pipe P is mounted on the rolling receiving rollers 24, 2
5, the ascending / descending cylinder 30 moves forward, and the receiving rollers 24 and 25 rise to a height at which the axis of the pipe P coincides with the path L.

(3) Since the rolling receiving roller 24 is rotating, the pipe P also rotates on the receiving rolling receiving rollers 24 and 25. The seam of the pipe P is a pipe seam detection sensor 4
When it comes below 3, 44, both sensors 43, 44 generate a detection signal.

(4) Due to this detection signal, the rotation of the rolling receiving rollers 24, 25 and the pipe P is stopped, the pipe P is positioned so that the joint thereof is directed upward, and the pressing cylinder 40 moves forward. To push the pipe P toward the mandrel 62. As a result, the end of the pipe P is externally fitted to the end of the mandrel 62, and further movement of the rod 40A causes the pipe P to push the pipe end contact plate 61 while supporting the pipe end contact plate 61.
2 and finally, the pipe P is sandwiched between the coil contact plate 42 of the pressing cylinder 40 and the pipe end contact plate 60 as shown in FIG.

(5) When the positioning of the pipe P is completed, the clampers 70 and 71 are closed, and the vicinity of the joint of the pipe P is pressed between the pipe P and the mandrel 62 as shown in FIG.

(6) When the clamping is completed, the welding torch 93 is lowered to weld the joint. (7) When welding is completed, the welding torch 93 retreats to the standby position, the clampers 71 and 72 open, and the mandrel cylinder rod A64 retreats. When the mandrel 62 retreats, the pipe P falls out of the mandrel 62 by the action of the coil spring 66 and falls onto the discharge unit 80.

[0024]

[Effects of the Invention] As described above, the present invention welds the pipe seam by receiving the pipe seam with the mandrel from the inner surface and holding the pipe seam with the clamper from the outer surface. Variation can be suppressed, and welding quality can be improved and variation in welding quality can be reduced as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a diagram showing an arrangement of each unit according to an embodiment of the present invention.

FIG. 2 is a perspective view excluding a part of the embodiment.

FIG. 3 is a view showing a pipe contact plate of a cylinder for pressing a pipe in the embodiment.

FIG. 4 is a diagram showing a configuration of a clamp unit in the embodiment.

FIG. 5 is a view showing a configuration of a welding unit in the embodiment.

FIG. 6 is a diagram showing a relationship between a pipe and a mandrel in the embodiment.

FIG. 7 is a diagram showing a pipe clamp state in the embodiment.

FIG. 8 is a side view of the welding unit in the embodiment.

FIG. 9 is a perspective view of the welding unit in the embodiment.

FIG. 10 is a perspective view of a pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Intermittent pipe feeding unit 20 Pipe rolling unit 24, 25 Roll receiving roller 30 Lifting cylinder 40 Pipe pressing unit 41 Pipe pressing cylinder 42 Pipe end contact plate 51, 52 Pipe seam detection sensor 60 Mandrel unit 61 Pipe end Contact plate 62 Mandrel 64 Mandrel advance / retreat driving cylinder 66 Coil spring 70 Clamp unit 71, 72 Clamper 75, 76 Clamper up / down cylinder 80 Pipe discharge unit 90 Welding unit 93 Welding torch

Claims (1)

(57) [Scope of request for utility model registration] An apparatus for welding a seam of a short pipe bent from a plate, comprising: a pipe feeding unit;
A pipe rolling unit which has a pair of rolling receiving rollers for receiving a pipe at a pipe outlet of the pipe supply unit and which can move up and down, and a cylinder in which a rod advances and retreats in the roller direction above the pair of rolling receiving rollers of the pipe rolling unit. A pipe pressing unit, a sensor unit having a seam sensor for detecting a seam in the pipe axial direction above the rolling receiving roller of the pipe rolling unit, and a pipe rolling unit interposed therebetween; A mandrel unit having a mandrel facing in the direction, a clamp unit located above a stationary position of the mandrel and having a clamper that can be raised and lowered on the mandrel, a pipe discharge unit, and a welding unit having a welding mechanism for welding a pipe joint. , The above-mentioned rolling A pipe end abutting plate abutting on one end of the pipe on the receiving roller pair is attached, the mandrel is capable of moving forward and backward in the horizontal direction, and is elastically connected to a supporting plate that cantileverly supports the base end thereof. A pipe end abutment plate through which a mandrel tip end penetrates, and the pipe end abutment plate is located near the raised rolling receiving roller pair and faces the pipe end abutment plate. Automatic pipe welding equipment.